Adjustable Overvoltage and Overcurrent Protectors with High Accuracy

Industry's Most Integrated OCP and OVP Solution with More Robust Reverse Current Blocking Capability

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The MAX17561/MAX17562/MAX17563 adjustable overvoltage and overcurrent-protection devices are ideal to protect systems against positive and negative input voltage faults up to ±40V and feature low 100mΩ (typ) RON FETs.

The adjustable overvoltage protection range is between 6V and 36V, while the adjustable undervoltage protection range is between 4.5V and 24V. The overvoltage-lockout (OVLO) and undervoltage-lockout (UVLO) thresholds are set using optional external resistors. The factory-preset internal OVLO threshold is 33V (typ) and the preset internal UVLO threshold is 19.2V (typ).

The ICs also feature programmable current-limit protection up to 4.2A. Once current reaches the threshold, the MAX17561 turns off after the 20.7ms (typ) blanking time and stays off during the retry period. The MAX17562 latches off after the blanking time, and the MAX17563 limits the current continuously. In addition, these devices feature reverse current and thermal-shutdown protection. The ICs are available in a small 14-pin TSSOP (5mm x 6.5mm) package and are specified over the extended -40°C to +125°C temperature range.

How to Add Overvoltage and Overcurrent Protection Using the MAX17561—Part 1

How to Add Overvoltage and Overcurrent Protection Using the MAX17561—Part 2

MAX17561, MAX17562, MAX17563: Functional Diagram MAX17561, MAX17562, MAX17563: Functional Diagram Enlarge+

Key Features

  • Industrial Power Protection Increases Robustness
    • Wide Input Supply Range: +4.5V to +36V
    • Negative Input Tolerance to -36V
    • Low RON 100mΩ (typ)
    • Reverse Current Flow Control Input
    • Thermal Overload Protection
    • Extended -40°C to +125°C Temperature Range
  • Flexible Design Options Eases Designs
    • Adjustable OVLO and UVLO Thresholds
    • Programmable Forward-Current Limit: 0.7A to 4.2A with ±15% Accuracy
    • Dual Enable Inputs: EN and High Voltage Active-Low HVEN
  • Saves Space
    • 14-Pin, 5mm x 6.5mm, TSSOP Package


  • Battery-Powered Applications
  • Consumer Electronics
  • Industrial Equipment
  • Marine Equipment
Part NumberChannelsVIN
Internal Pwr. MOSFETsRON
Current Limit
Current Limit
Current Limit Accuracy
Fault ResponseReverse Current Protect.Fault IndicatorOper. Temp.
minmaxtypminmaxSee Notes
MAX17561 14.536NMOS+PMOS1000.74.215Auto RetryYesYes-40 to +125
$3.41 @1k
MAX17562 Latchoff
MAX17563 Continuous
See All Overvoltage/Overcurrent Protectors with Internal MOSFETs (26)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX17561EVKIT: Evaluation Kit for the MAX17561/MAX17562 and MAX17563
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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